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The 18 mm block features stainless steel ball bearings and an integrated stainless inner race and rivet for optimal strength-to-weight. The 40 mm blocks feature composite sheaves that spin freely on Delrin® ball bearings with curved bearing races. They have no metal shackles or rivets, making them the lightest soft-attach blocks Harken has ever designed. Delrin is a registered trademark of E. I. du Pont de Nemours and Company or its affiliates.
Sheave Ø (mm) 40 mm
Sheave Ø (in) 1 9/16 in
Maximum line Ø (mm) 5 mm
Maximum line Ø (in) 3/16 in
Maximum working load (kg) 125 kg
Maximum working load (lb) 275 lb
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